Boulder, Colorado, United States of America: What to pack, what to wear, and when to go [2018]

Traveling to Boulder, Colorado, United States of America? If you're planning to go to Boulder, here is some important information about when to go, what to wear, and what to pack:

When to go to Boulder, Colorado, United States of America

Based on the climate and weather in Boulder, the best time to go is August. See below for details.

What to wear/what to pack for Boulder, Colorado, United States of America by month

January

Traveling to Boulder in January, you will notice that it can be brisk. Daytime temperatures are in the 40s F (single digits C).

What to wear/what to pack:

  • Cold weather footwear
  • Heavy socks
  • Heavy jacket
  • Sweaters
  • Warm pants or jeans
  • Gloves or mittens

February

If you are traveling to Boulder in February, you will notice that it is cold. Daytime temperatures are in the 40s F (single digits C).

What to wear/what to pack:

  • Sweaters
  • Gloves or mittens
  • Heavy jacket
  • Cold weather footwear
  • Heavy socks
  • Warm pants or jeans

March

If you go to Boulder in March, you will notice that it is brisk. Expect it to rain sometimes. Daytime temperatures are in the low 50s F (low 10s C).

What to wear/what to pack:

  • Umbrella
  • Waterproof luggage
  • Waterproof footwear
  • Warm pants or jeans
  • Gloves or mittens
  • Cold weather footwear
  • Rain coat
  • Heavy jacket
  • Heavy socks
  • Sweaters

April

If you visit Boulder during April, you are likely to find that it is cool. Temperatures tend to hover around the low 60s F (mid 10s C) during the day, while at night they can dip into the 30s F (single digits C).

In terms of precipitation, you can expect it to rain occasionally.

What to wear/what to pack:

  • Standard footwear
  • Light gloves or mittens
  • Rain coat
  • Jacket or coat
  • Warm pants or jeans
  • Waterproof footwear
  • Waterproof luggage
  • Socks
  • Fleeces
  • Umbrella

May

May in Boulder is mild. The rain can amount to several inches/centimeters. During this time, temperatures average in the high 60s F (low 20s C), although night temperatures can dip into the low 30s F (single digits C).

What to wear/what to pack:

  • Dresses
  • Light jacket or fleece
  • Standard footwear
  • Long sleeve shirts or blouses
  • Long skirts
  • Umbrella
  • Waterproof luggage
  • Rain coat
  • Waterproof footwear
  • Pants or jeans
  • Socks

June

If you go to Boulder in June, you will notice that it is a perfect temperature. Daytime temperatures are in the high 70s F (mid 20s C).

What to wear/what to pack:

  • Umbrella
  • Sandals
  • Shorts or short pants
  • Rain coat
  • Light footwear
  • Waterproof footwear
  • Skirts
  • Sunscreen lotion
  • Long and short sleeve shirts
  • Dresses
  • Waterproof luggage

July

July in Boulder is extremely warm. The rain can amount to several inches/centimeters. During this time, temperatures average in the low 70s F (low 20s C) to 80s F (high 20s C).

What to wear/what to pack:

  • Umbrella
  • Dresses
  • Sandals
  • Shorts
  • Rain coat
  • Short sleeve shirts
  • Waterproof luggage
  • Waterproof footwear
  • Sunscreen lotion
  • Sunglasses
  • Skirts

August

August in Boulder is extremely warm. Temperatures average in the low 80s F (high 20s C) during the day.

What to wear/what to pack:

  • Short sleeve shirts
  • Umbrella
  • Dresses
  • Waterproof footwear
  • Rain coat
  • Sandals
  • Sunscreen lotion
  • Skirts
  • Waterproof luggage
  • Shorts
  • Sunglasses

September

September for Boulder is warm and dry with little rain. Temperatures average in the high 70s F (mid 20s C) during the day.

What to wear/what to pack:

  • Shorts or short pants
  • Sandals
  • Light footwear
  • Dresses
  • Sunscreen lotion
  • Skirts
  • Long and short sleeve shirts

October

If you visit Boulder during October, you are likely to find that it is cool.

Temperatures tend to hover around the 60s F (high 10s C) during the day, while at night they can dip into the high 30s F (single digits C).

What to wear/what to pack:

  • Waterproof footwear
  • Waterproof luggage
  • Standard footwear
  • Light gloves or mittens
  • Socks
  • Warm pants or jeans
  • Fleeces
  • Umbrella
  • Jacket or coat
  • Rain coat

November

If you go to Boulder in November, you will notice that it can be brisk. Daytime temperatures are in the 50s F (low 10s C).

What to wear/what to pack:

  • Fleeces
  • Socks
  • Standard footwear
  • Warm pants or jeans
  • Jacket or coat
  • Light gloves or mittens

December

December in Boulder can be brisk. The average overnight temperatures in the area are in the low 20s F (single digits below 0 C).

What to wear/what to pack:

  • Sweaters
  • Warm pants or jeans
  • Heavy jacket
  • Heavy socks
  • Gloves or mittens
  • Cold weather footwear

Year-round what to wear/what to pack for Boulder, Colorado, United States of America

Here are some general tips on what to wear in Boulder, as well as several items to remember to pack when traveling there.

  • A plug adadpter that supports outlet types A and B
  • A SIM card that works in Boulder
  • Appropriate museum wear
  • Bicycle friendly attire, if you plan on biking anywhere

Check out our guides for these other locations: Richmond, Maine, United States of America, Pisco, Peru, Northwest São Paulo, São Paulo, Brazil, Harrogate, England, United Kingdom, London Stansted Airport, England, United Kingdom, Torquay, England, United Kingdom, LaPlace, Louisiana, United States of America, Mbombela, South Africa, Malé, Maldives, The Coorong, South Australia, Australia, and Weymouth, Massachusetts, United States of America.